trivers json node as node type2
private void appendNodeToYaml(
JsonNode node, StringBuilder yaml, int depth, boolean isArrayItem) {
Iterator<Entry<String, JsonNode>> fields = node.fields();
boolean isFirst = true;
while (fields.hasNext()) {
Entry<String, JsonNode> jsonField = fields.next();
addFieldNameToYaml(yaml, jsonField.getKey(), depth, isArrayItem && isFirst);
processNode(jsonField.getValue(), yaml, depth+1);
isFirst = false;
}
}